Examples from literature

• And in the midst of these crushing trials he was expected to compose a comic opera! 
• He had been there twenty years, and he had never before heard of such singing in comic opera. 
• It was not till a comic opera came along that Eileen was able to take the theatre seriously. 
• The scene was certainly a strange one—as strange as if taken from a comic opera. 
• There were straight plays, comic operas, and melodramas.